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  5. 2ⁿ(n - 1) ＋ 1 ― {2ⁿ¯¹...
Mathematics
Senior High
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浪人なんちゃらほい
浪人なんちゃらほい

2ⁿ(n - 1) ＋ 1 ― {2ⁿ¯¹(n - 2)＋ 1}
の答えは　n・2ⁿ¯¹　になります。
途中計算を教えてください

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